Patron of the Moon + Tiller Engine + Simic Growth Chamber

Patron of the Moon

Tiller Engine

Simic Growth Chamber

How it works

1. Pay 1 to activate Patron of the Moon, putting Simic Growth Chamber from your hand onto the battlefield.
2. When Simic Growth Chamber enters, it and Tiller Engine each trigger.
3. Resolve Tiller Engine's ability, untapping Simic Growth Chamber.
4. Activate Simic Growth Chamber by tapping it, adding two mana.
5. Resolve Simic Growth Chamber's triggered ability, returning it from the battlefield to your hand.
6. Repeat.